Question

find the value of
(x,-1) (2, 1) & (4.5) are
for which the point
Collineax.​

Answer 1

Let A(x,-1)

B(2,1)

C(4,5)

If ABC is collinear then ar(ABC)=0

area of triangle=1/2[x1(y2-y3) +x2(y3-y1) +x3(y1-y2)]

1/2[x(1-5)+2(5+1)+4(-1-1)]=0

x(-4)+2(6)+4(-2)=0

-4x+12-8=0

-4x+4=0

4=4x

x=1

FOR MORE DETAILS REFER THE IMAGE,

Answer 2

Answer:

The value of x = 1..................................................